Listen Server(for local play):
1. Download the latest version installer package. Link can be found in to the site or in to the other pinned topic.

2. Run the installer and point your X:\Sierra\Half-Life\ folder for CS 1.5 or your X:\Steam\Steamapps\Your_Acc\counter-strike\ for CS 1.6.

If you have Metamod and other plugins installed open the plugins.ini file(The configuration file of Metamod) and add this line
win32 EPODbot\EPB.dll

If you don't have Metamod open with text editor the liblist.gam file located in
X:\Sierra\Half-Life\cstrike\ folder for CS 1.5 or your X:\Steam\Steamapps\Your_Acc\counter-strike\cstrike\ for CS 1.6.
Find this line:
gamedll "dlls\mp.dll"
and change it to look like this:
gamedll "EPODbot\EPB.dll"

Its totaly the same just if you are using Steam point this folder
X:\Steam\Steamapps\Your_Acc\dedicated server\

If you don't have Metamod open with text editor the liblist.gam file located in
X:\Sierra\Half-Life\cstrike\ folder for CS 1.5 or your X:\Steam\Steamapps\Your_Acc\counter-strike\cstrike\ for CS 1.6.
Find this line:
gamedll "dlls\mp.dll"
and change it to look like this:
gamedll "EPODbot\EPB.dll"

Linux: I think that every one that can setup Linux server can install EPB too, anyway when I have more time I will write and Linux tutorial.